Question

how many particles would be found in a 2.1 mol sample of AlPO4?

Answer 1

Answer:

1.3 × 10²⁴ particles AlPO₄

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Chemistry

Atomic Structure

• Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

• Using Dimensional Analysis

Explanation:

Step 1: Define

2.1 mol AlPO₄

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

1. Set up:                        $\displaystyle 2.1 \ mol \ AlPO_4(\frac{6.022 \cdot 10^{23} \ particles \ AlPO_4}{1 \ mol \ AlPO_4})$
2. Multiply/Divide:          $\displaystyle 1.26462 \cdot 10^{24} \ particles \ AlPO_4$

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1.26462 × 10²⁴ particles AlPO₄ ≈ 1.3 × 10²⁴ particles AlPO₄